【SpringBoot】---整合Shiro安全框架

【SpringBoot】---整合Shiro安全框架

一、什么是Shiro

●Apache Shiro是一个Java 的安全(权限)框架。
●Shiro可以非常容易的开发出足够好的应用，其不仅可以用在JavaSE环境，也可以用在JavaEE环境。
●Shiro可以完成，认证，授权，加密，会话管理，Web集成，缓存等.

●下载地址: http://shiro.apache.org/

1、Shiro的功能

●Authentication: 身份认证、登录，验证用户是不是拥有相应的身份;
●Authorization:授权,即权限验证，验证某个已认证的用户是否拥有某个权限，即判断用户能否进行什么操作，如:验证某个用户是否拥有某个角色，或者细粒度的验证某个用户对某个资源是否具有某个权限!
●Session Manager: 会话管理，即用户登录后就是第-次会话，在没有退出之前，它的所有信息都在会话中;会话可以是普通的JavaSE环境，也可以是Web环境;
●Cryptography: 加密,保护数据的安全性，如密码加密存储到数据库中，而不是明文存储;
●Web Support: Web支持，可以非常容易的集成到Web环境;
●Caching: 缓存，比如用户登录后，其用户信息，拥有的角色、权限不必每次去查,这样可以提高效率
●Concurrency: Shiro支持多线程应用的并发验证，即，如在-个线程中开启另-一个线程,能把权限自动的传
播过去
●Testing:提供测试支持;
●RunAs:允许一个用户假装为另-一个用户(如果他们允许)的身份进行访问;
●Remember Me:记住我，这个是非常常见的功能，即一-次登录后， 下次再来的话不用登录了

2、Shiro架构（外部）

●subject: 应用代码直接交互的对象是Subject, 也就是说Shiro的对外API核心就是Subject, Subject代表了当前的用户，这个用户不-定是一个具体的人，与当前应用交互的任何东西都是Subject,如网络爬虫，机器人等，与Subject的所有交互都会委托给SecurityManager; Subject其实是一一个门面， SecurityManageer 才是
实际的执行者
●SecurityManager: 安全管理器，即所有与安全有关的操作都会与SercurityManager交互, 并且它管理着所有的Subject,可以看出它是Shiro的核心，它负责与Shiro的其他组件进行交互，它相当于SpringMVC的DispatcherServlet的角色
●Realm: Shiro从Realm获取安全数据 (如用户,角色，权限)，就是说SecurityManager要验证用户身份，那么它需要从Realm获取相应的用户进行比较，来确定用户的身份是否合法;也需要从Realm得到用户相应的角色、权限，进行验证用户的操作是否能够进行，可以把Realm看DataSource

二、Hello-Shiro

1、创建一个空的maven项目

①依赖

<dependencies>
        <!-- https://mvnrepository.com/artifact/org.apache.shiro/shiro-core -->
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-core</artifactId>
            <version>1.7.1</version>
        </dependency>

        <!-- configure logging -->
        <!-- https://mvnrepository.com/artifact/org.slf4j/jcl-over-slf4j -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>jcl-over-slf4j</artifactId>
            <version>2.0.0-alpha2</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-log4j12 -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>2.0.0-alpha1</version>
            <scope>test</scope>
        </dependency>

        <!-- https://mvnrepository.com/artifact/log4j/log4j -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>

    </dependencies>

②Resources目录下添加log4j的配置文件

log4j.properties

log4j.rootLogger=INFO, stdout

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] - %m %n

# General Apache libraries
log4j.logger.org.apache=WARN

# Spring
log4j.logger.org.springframework=WARN

# Default Shiro logging
log4j.logger.org.apache.shiro=INFO

# Disable verbose logging
log4j.logger.org.apache.shiro.util.ThreadContext=WARN
log4j.logger.org.apache.shiro.cache.ehcache.EhCache=WARN

③Resources目录下添加shiro.ini文件

[users]
# user 'root' with password 'secret' and the 'admin' role
root = secret, admin
# user 'guest' with the password 'guest' and the 'guest' role
guest = guest, guest
# user 'presidentskroob' with password '12345' ("That's the same combination on
# my luggage!!!" ;)), and role 'president'
presidentskroob = 12345, president
# user 'darkhelmet' with password 'ludicrousspeed' and roles 'darklord' and 'schwartz'
darkhelmet = ludicrousspeed, darklord, schwartz
# user 'lonestarr' with password 'vespa' and roles 'goodguy' and 'schwartz'
lonestarr = vespa, goodguy, schwartz

# -----------------------------------------------------------------------------
# Roles with assigned permissions
# 
# Each line conforms to the format defined in the
# org.apache.shiro.realm.text.TextConfigurationRealm#setRoleDefinitions JavaDoc
# -----------------------------------------------------------------------------
[roles]
# 'admin' role has all permissions, indicated by the wildcard '*'
admin = *
# The 'schwartz' role can do anything (*) with any lightsaber:
schwartz = lightsaber:*
# The 'goodguy' role is allowed to 'drive' (action) the winnebago (type) with
# license plate 'eagle5' (instance specific id)
goodguy = winnebago:drive:eagle5

④Quickstart.java

import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.*;

//import org.apache.shiro.ini.IniSecurityManagerFactory;
import org.apache.shiro.mgt.DefaultSecurityManager;
import org.apache.shiro.realm.text.IniRealm;

import org.apache.shiro.mgt.SecurityManager;
import org.apache.shiro.session.Session;
import org.apache.shiro.subject.Subject;
//import org.apache.shiro.lang.util.Factory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


/**
 * Simple Quickstart application showing how to use Shiro's API.
 *
 * @since 0.9 RC2
 */
public class Quickstart {

    private static final transient Logger log = LoggerFactory.getLogger(Quickstart.class);


    public static void main(String[] args) {

        // The easiest way to create a Shiro SecurityManager with configured
        // realms, users, roles and permissions is to use the simple INI config.
        // We'll do that by using a factory that can ingest a .ini file and
        // return a SecurityManager instance:

        // Use the shiro.ini file at the root of the classpath
        // (file: and url: prefixes load from files and urls respectively):

        //原本的方法
//        Factory<SecurityManager> factory = new IniSecurityManagerFactory("classpath:shiro.ini");
//        SecurityManager securityManager = factory.getInstance();

        //新方法   shiro更新问题
        DefaultSecurityManager securityManager = new DefaultSecurityManager();
        IniRealm iniRealm = new IniRealm("classpath:shiro.ini");
        securityManager.setRealm(iniRealm);

        // for this simple example quickstart, make the SecurityManager
        // accessible as a JVM singleton.  Most applications wouldn't do this
        // and instead rely on their container configuration or web.xml for
        // webapps.  That is outside the scope of this simple quickstart, so
        // we'll just do the bare minimum so you can continue to get a feel
        // for things.
        SecurityUtils.setSecurityManager(securityManager);

        // Now that a simple Shiro environment is set up, let's see what you can do:

        // get the currently executing user:
        Subject currentUser = SecurityUtils.getSubject();

        // Do some stuff with a Session (no need for a web or EJB container!!!)
        Session session = currentUser.getSession();
        session.setAttribute("someKey", "aValue");
        String value = (String) session.getAttribute("someKey");
        if (value.equals("aValue")) {
            log.info("Retrieved the correct value! [" + value + "]");
        }

        // let's login the current user so we can check against roles and permissions:
        if (!currentUser.isAuthenticated()) {
            UsernamePasswordToken token = new UsernamePasswordToken("lonestarr", "vespa");
            token.setRememberMe(true);
            try {
                currentUser.login(token);
            } catch (UnknownAccountException uae) {
                log.info("There is no user with username of " + token.getPrincipal());
            } catch (IncorrectCredentialsException ice) {
                log.info("Password for account " + token.getPrincipal() + " was incorrect!");
            } catch (LockedAccountException lae) {
                log.info("The account for username " + token.getPrincipal() + " is locked.  " +
                        "Please contact your administrator to unlock it.");
            }
            // ... catch more exceptions here (maybe custom ones specific to your application?
            catch (AuthenticationException ae) {
                //unexpected condition?  error?
            }
        }

        //say who they are:
        //print their identifying principal (in this case, a username):
        log.info("User [" + currentUser.getPrincipal() + "] logged in successfully.");

        //test a role:
        if (currentUser.hasRole("schwartz")) {
            log.info("May the Schwartz be with you!");
        } else {
            log.info("Hello, mere mortal.");
        }

        //test a typed permission (not instance-level)
        if (currentUser.isPermitted("lightsaber:wield")) {
            log.info("You may use a lightsaber ring.  Use it wisely.");
        } else {
            log.info("Sorry, lightsaber rings are for schwartz masters only.");
        }

        //a (very powerful) Instance Level permission:
        if (currentUser.isPermitted("winnebago:drive:eagle5")) {
            log.info("You are permitted to 'drive' the winnebago with license plate (id) 'eagle5'.  " +
                    "Here are the keys - have fun!");
        } else {
            log.info("Sorry, you aren't allowed to drive the 'eagle5' winnebago!");
        }

        //all done - log out!
        currentUser.logout();

        System.exit(0);
    }
}

三、Spring Boot整合Shiro

1、环境搭建

①新建一个Spring Boot项目

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.darkerg</groupId>
    <artifactId>shiroboot</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>shiroboot</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>

        <!--
            Subject用户
            SecurityManager用户管理
            Realm数据
        -->
        <!--shiro整合Sprin的包-->
        <!-- https://mvnrepository.com/artifact/org.apache.shiro/shiro-spring -->
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-spring</artifactId>
            <version>1.7.1</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.5.5</version>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

②config配置

ShiroConfig

package com.darkerg.shiroboot.config;

import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
import org.apache.shiro.web.mgt.DefaultWebSecurityManager;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class ShiroConfig {

    //ShiroFilterFactoryBean
    @Bean
    public ShiroFilterFactoryBean getShiroFilterFactoryBean(@Qualifier("securityManager") DefaultWebSecurityManager defaultWebSecurityManager){
        ShiroFilterFactoryBean bean = new ShiroFilterFactoryBean();
        //设置安全管理器
        bean.setSecurityManager(defaultWebSecurityManager);
        return bean;
    }
    //DefaultWebSecurityManager
    @Bean(name = "securityManager")
    public DefaultWebSecurityManager defaultWebSecurityManager(@Qualifier("userRealm") UserRealm userRealm){
        DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
        //关联UserRealm
        securityManager.setRealm(userRealm);
        return securityManager;
    }
    //创建realm对象，需要自定义类
    @Bean(name = "userRealm")
    public UserRealm userRealm(){
        return new UserRealm();
    }
}

UserRealm

package com.darkerg.shiroboot.config;

import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;

//自定义的Realm
public class UserRealm extends AuthorizingRealm {
    //授权
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
        System.out.println("执行了授权");
        return null;
    }

    //认证
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException {
        System.out.println("执行了认证");
        return null;
    }
}

③Controller层

MyController

package com.darkerg.shiroboot.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class MyController {

    @RequestMapping({"/","index"})
    public String toIndex(Model model){
        model.addAttribute("msg","hello,shiro");
        return "index";
    }

    @RequestMapping("/user/add")
    public String add(){
        return "user/add";
    }

    @RequestMapping("/user/update")
    public String update(){
        return "user/update";
    }

}

④前端页面

index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h1>首页</h1>
<p th:text="${msg}"></p>

<a th:href="@{/user/add}">add</a> | <a th:href="@{/user/update}">update</a>
</body>
</html>

add.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
<h1>添加一个用户</h1>
</body>
</html>

update.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
<h1>修改一个用户</h1>
</body>
</html>

2、实现登录拦截

①添加Shiro的内置过滤器

在Shiro配置类中修改下面的方法

@Bean
    public ShiroFilterFactoryBean getShiroFilterFactoryBean(@Qualifier("securityManager") DefaultWebSecurityManager defaultWebSecurityManager){
        ShiroFilterFactoryBean bean = new ShiroFilterFactoryBean();
        //设置安全管理器
        bean.setSecurityManager(defaultWebSecurityManager);

        //添加shiro的内置过滤器
        /**
         * anon:无需认证就可以访问
         * authc：必须认证了才能访问
         * user：必须拥有 记住我 功能才能用
         * perms；拥有对某个资源的权限才能访问
         * role：拥有某个角色权限才能访问
         */
        Map<String, String> filterMap = new LinkedHashMap<>();
        filterMap.put("/user/add","authc");
        filterMap.put("/user/update","authc");
        //或者使用通配符
        //filterMap.put("/user/*","authc")

        bean.setFilterChainDefinitionMap(filterMap);
        return bean;
    }

此时我们访问添加和更新的页面，会报错，说明拦截成功了。

②编写一个登录的页面

实现拦截之后，跳转到登录页面。

login.html

<!DOCTYPE html>
<html lang="en" xmlns:th="https://www.thymeleaf.org">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
<h1>登陆</h1>
<hr>
<p style="color: red" th:text="${msg}"></p>
<form th:action="@{/login}">
  <p>用户名：<input type="text" name="username"></p>
  <p>密码：<input type="password" name="password"></p>
  <p><input type="submit"></p>
</form>
</body>
</html>

同时编写相应的控制器

@RequestMapping("/toLogin")
    public String toLogin(){
        return "login";
    }

③在拦截方法下面加上登录url

此时就实现了登录拦截。

3、实现用户认证

①添加一个登录接口

@RequestMapping("/login")
public String login(String username,String password,Model model){
    //获取当前用户
    Subject subject = SecurityUtils.getSubject();
    //封装用户的登录数据
    UsernamePasswordToken token = new UsernamePasswordToken(username, password);

    try {
        subject.login(token);//执行登录的方法，如果没有异常说明就ok了
        return "index";
    } catch (UnknownAccountException e) {//用户名不存在
        model.addAttribute("msg","用户名错误");
        return "login";
    } catch (IncorrectCredentialsException e){//密码不存在
        model.addAttribute("msg","密码错误");
        return "login";
    }
}

此时重新发布项目，然后点击登录之后，会出现用户名不存在。因为我们还没有添加认证。

②在UserRealm自定义Realm中添加认证的细节

    //认证
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException {
        System.out.println("执行了认证");

        //用户名，密码    数据库中去取
        String name = "root";
        String password = "123456";

        UsernamePasswordToken userToken = (UsernamePasswordToken) authenticationToken;

        if (!userToken.getUsername().equals(name)){
            return null;//抛出异常 UnkonwAccountException
        }

        //密码认证，shiro做
        return new SimpleAuthenticationInfo("",password,"");
    }

4、Shiro整合Mybatis

①添加依赖

 <!--lombok-->
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
</dependency>
<!--mysql-->
 <dependency>
     <groupId>mysql</groupId>
     <artifactId>mysql-connector-java</artifactId>
 </dependency>
 <!--log4j-->
 <dependency>
     <groupId>log4j</groupId>
     <artifactId>log4j</artifactId>
     <version>1.2.17</version>
 </dependency>
 <!--druid数据源-->
 <!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
 <dependency>
     <groupId>com.alibaba</groupId>
     <artifactId>druid</artifactId>
     <version>1.2.8</version>
 </dependency>
 <!--MyBatis-->
 <dependency>
     <groupId>org.mybatis.spring.boot</groupId>
     <artifactId>mybatis-spring-boot-starter</artifactId>
     <version>2.2.0</version>
 </dependency>

②新建一个shiro数据库

user表

③新建application.yaml

spring:
  datasource:
    username: root
    password: root
    url: jdbc:mysql://localhost:3306/shiro?useUnicode=true&characterEncoding=UTF-8&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
    driver-class-name: com.mysql.cj.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource

    #Spring Boot 默认是不注入这些属性值的，需要自己绑定
    #druid 数据源专有配置
    initialSize: 5
    minIdle: 5
    maxActive: 20
    maxWait: 60000
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: SELECT 1 FROM DUAL
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true

    #配置监控统计拦截的filters，stat:监控统计、log4j：日志记录、wall：防御sql注入
    #如果允许时报错  java.lang.ClassNotFoundException: org.apache.log4j.Priority
    #则导入 log4j 依赖即可，Maven 地址：https://mvnrepository.com/artifact/log4j/log4j
    filters: stat,wall,log4j
    maxPoolPreparedStatementPerConnectionSize: 20
    useGlobalDataSourceStat: true
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500
mybatis:
  type-aliases-package: com.huang.pojo
  mapper-locations: classpath:mybatis/mapper/*.xml

④application.properties配置一下

⑤pojo新建实体类User

package com.darkerg.shiroboot.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class User {
    int id;
    String name;
    String pwd;
}

⑥mapper下新建UserMapper

package com.darkerg.shiroboot.mapper;

import com.darkerg.shiroboot.pojo.User;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;

@Repository
@Mapper
public interface UserMapper {

    @Select("select * from user where name = #{name}")
    public User queryUserByName(@Param("name") String name);
}

⑦Service层

UserService就不放了，重新写一下就行。

UserServiceImpl

package com.darkerg.shiroboot.service;

import com.darkerg.shiroboot.mapper.UserMapper;
import com.darkerg.shiroboot.pojo.User;
import org.springframework.beans.factory.annotation.Autowired;

public class UserServiceImpl implements UserService{

    @Autowired
    UserMapper userMapper;

    @Override
    public User queryUserByName(String name) {
        return userMapper.queryUserByName(name);
    }
}

⑧重写UserRealm---连接数据库版

package com.darkerg.shiroboot.config;

import com.darkerg.shiroboot.pojo.User;
import com.darkerg.shiroboot.service.UserServiceImpl;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.*;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.apache.shiro.subject.Subject;
import org.springframework.beans.factory.annotation.Autowired;

//自定义的Realm
public class UserRealm extends AuthorizingRealm {

    @Autowired
    UserServiceImpl userService;

    //授权
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
        System.out.println("执行了授权");
        return null;
    }

    //认证
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException {
        System.out.println("执行了认证");


        UsernamePasswordToken userToken = (UsernamePasswordToken) authenticationToken;

        //连接真实的数据库
        User user = userService.queryUserByName(userToken.getUsername());

        if (user == null){//没有这个人
            return null;
        }

        //密码认证，shiro做
        return new SimpleAuthenticationInfo("",user.getPwd(),"");
    }
}

此时，重启项目，输入用户名密码即可登录了。

5、Shiro请求授权的实现

①在ShiroConfig的过滤器中添加授权功能测试

    @Bean
    public ShiroFilterFactoryBean getShiroFilterFactoryBean(@Qualifier("securityManager") DefaultWebSecurityManager defaultWebSecurityManager){
	//....和上面的一样	
        //授权，未授权的情况下会跳转到未授权的页面。
        filterMap.put("/user/add","perms[user:add]");
        filterMap.put("/user/update","perms[user:update]");
    }

此时登陆之后，再次点击add请求，会出现未授权的错误页面

除此之外，还可以通过Shiro定制未授权的请求。

bean.setUnauthorizedUrl();

②在UserRealm中添加授权功能

//授权
@Override
protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
    System.out.println("执行了授权");

    SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();

    info.addStringPermission("user:add");
	
    return info;
}

然后重新启动项目，发现可以进去add的请求了，但是现在的问题就是所有的用户都可以访问add请求。那么如何为特定的用户添加呢？

③为特定用户添加特定的权限

修改数据库，添加权限的字段，同时别忘了要在Pojo实体类中也添加相应的属性。

④授权如何获得认证的信息

在认证的时候添加，然后再授权的时候提取。

//授权
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
        System.out.println("执行了授权");

        SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();

        info.addStringPermission("user:add");

        //拿到当前登录的这个对象
        Subject subject = SecurityUtils.getSubject();
        User currentUser =(User) subject.getPrincipal();//拿到User对象

        //设置当前用户的权限
        info.addStringPermission(currentUser.getPerms());

        return info;
    }

    //认证
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException {
        System.out.println("执行了认证");


        UsernamePasswordToken userToken = (UsernamePasswordToken) authenticationToken;

        //连接真实的数据库
        User user = userService.queryUserByName(userToken.getUsername());

        if (user == null){//没有这个人
            return null;
        }

        //密码认证，shiro做
        //此处，把user放进去
        return new SimpleAuthenticationInfo(user,user.getPwd(),"");
    }

到目前位置，darkerg用户登录上去之后，只可以点击update了。

6、Shiro整合Thymeleaf

①添加Maven依赖

<!--Shiro-thymeleaf整合-->
<!-- https://mvnrepository.com/artifact/com.github.theborakompanioni/thymeleaf-extras-shiro -->
<dependency>
    <groupId>com.github.theborakompanioni</groupId>
    <artifactId>thymeleaf-extras-shiro</artifactId>
    <version>2.0.0</version>
</dependency>

②ShiroConfig中添加配置

//整合ShiroDialect：用来整合Shiro thymeleaf
@Bean
public ShiroDialect getShiroDialect(){
    return new ShiroDialect();
}

③修改首页index.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org"
                xmlns:shiro="http://www.thymeleaf.org/thymeleaf-extras-shiro">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h1>首页</h1>
<p>
    <a th:href="@{/toLogin}">登录</a>
</p>
<p th:text="${msg}"></p>
<hr>

<div shiro:hasPermission="user:add">
    <a th:href="@{/user/add}">add</a>
</div>

<div shiro:hasPermission="user:update">
    <a th:href="@{/user/update}">update</a>
</div>
</body>
</html>